89
In the event of a fault, the red fault indicator on the
control unit flashes. appears on the display and
"Fault"
is shown.
Note
If a central fault message facility is connected, this is
switched on.
For an explanation of fault codes, see chapter "Fault
messages".
Acknowledging the fault display
Tap
"Confirm"
.
The footer shows .
Note
Any connected central fault message facility is
switched off.
If an acknowledged fault is not remedied, the fault
message will be redisplayed the following day at
07:00 h, and the fault message facility restarts.
Calling up acknowledged fault messages
Tap the following buttons:
1.
Note
If service messages are present at the same time
in the heating system,
"Faults"
and
"Service,
messages"
appear.
2. "Faults"
The fault messages appear in red and in chrono-
logical order in a list.
Service messages appear in yellow.
Calling up fault messages from the fault memory
(fault history)
The 10 most recent faults (including those remedied)
and service messages are saved and can be called
up.
Faults are sorted by date.
Tap the following buttons:
1. "Menu"
2. "Service"
3.
Enter
"viservice"
password.
4. "Fault history"
5.
Use to call up further information on the relevant
fault.
6.
If you wish to delete the list, tap
"Delete"
.
Note
The fault lists are shown separately in conjunction
with a ventilation system (Vitovent). The ventilation
system fault codes can be called up as menu
points within the standard fault history. This list can
only be cleared via "Delete" within this history.
Fault codes
Fault code dis-
played
System characteristics
Cause
Measures
10
Controls as if the outside
temperature were 0 °C
Short circuit, outside tem-
perature sensor
Check outside temperature sensor
(see page 103)
18
Controls as if the outside
temperature were 0 °C
Lead break, outside tem-
perature sensor
Check outside temperature sensor
(see page 103)
19
Controls as if the outside
temperature were 0 °C
Communication interrup-
tion, outside temperature
sensor RF
Check wireless connection. Place
outside temperature sensor RF
close to the boiler.
Forget outside temperature sensor,
then pair again (see separate
documents).
Replace outside temperature sen-
sor RF.
Troubleshooting
Fault display
5789 302 GB
Diagnosis
Summary of Contents for B2TB
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Page 117: ...117 Parts lists Hydraulics 5789 302 GB Components ...
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